All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

The product of the transmittance of the first air-glass interface and the transmittance of the second air-glass interface is the correction factor. The correction factor then is multiplied by the internal transmittance, and their product is the external transmittance.

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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass Type
All colored Schott Glass products are defined by a two-letter group prefix followed by a number or series of numbers. Enter the same number for the corresponding prefix in the "At least" box and the "No more than" box to select an exact Schott Glass color. Enter different numbers in both the "At least" and "No more than" boxes if a range of products within a single color grouping is desired. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Schott Glass designation prefix. BG- followed by a number gives the exact Schott Glass Color. The BG prefix indicates the glass to be blue-green multiband. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. FG- followed by a number gives the exact Schott Glass Color. The FG prefix indicates the glass to be blue-brown. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. GG- followed by a number gives the exact Schott Glass Color. The GG prefix indicates the glass to be yellow. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. KG- followed by a number gives the exact Schott Glass Color. The KG prefix indicates the glass to be an IR filter virtually transparent in the visible range. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. NG- followed by a number gives the exact Schott Glass Color. The NG prefix indicates the glass to be neutral density. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. OG- followed by a number gives the exact Schott Glass Color. The OG prefix indicates the glass to be orange. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. RG- followed by a number gives the exact Schott Glass Color. The RG prefix indicates the glass to be red or black with IR transmission. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. UG- followed by a number gives the exact Schott Glass Color. The UG prefix indicates the color to be black with UV transmission. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. VG- followed by a number gives the exact Schott Glass Color. The VG prefix indicates the glass to be green. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Schott Glass designation prefix. WG- followed by a number gives the exact Schott Glass Color. The WG prefix indicates the glass to be UV long-pass. If more than one color is needed, perform a separate search for each color. Selecting values for more than one color prefix will result in no search returns.

Search Logic:

User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 10 / 5 indicates the average diameter of the digs to be .05 mm and the average length of a scratch is .10 mm.

A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 20 / 10 indicates the average diameter of the digs to be .10 mm and the average length of a scratch is .20 mm.

A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 40 / 20 indicates the average diameter of the digs to be .20 mm and the average length of a scratch is .40 mm.

A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 60 / 40 indicates the average diameter of the digs to be .40 mm and the average length of a scratch is .60 mm.

A dig is a defect on a polished optical surface that is nearly equal in terms of its length and width. A scratch is a defect on a polished optical surface whose length is many times its width. 80 / 50 indicates the average diameter of the digs to be .50 mm and the average length of a scratch is .80 mm.

All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.